Box motion for looms



1932- J. H. ATWOOD ET AL 1,342,305

.BOX MOTION FOR LOOMS Filed Feb. 8, ,1929 3 Sheets-Sheet l WITNESSES lNVl-iNTORS Joel 1f. Jllwao CZ Carl S. Procf'or ATTORNEYS Jan. 19,- 1932. J. ATwoD ET AL BOX MOTION FOR LOOMS Filed Feb. 8, 1929 3 Shets-Sheet 2 MnHHUHHHHWHHHN I I U I INVENTORS JveLJ-[Jltu/ood Carl S. Proctor WITNESSES ATTORNEYS Jan. 19, 1932. .1. H. ATWOOD ET AL BOX MOTION FOR LOOMS Filed Feb. 8, 1929 3 Sheets-Sheet 3 WITNESSES ATTORNEYS Patented Jamie, 1932 UNITED STATES PATENT OFFICE on imam ATWOOD Ann CARL s. rnooroa for AYER, MASSACHUSETTS; Assrenons V To EDITH H. PRIEST, or AYER,-MASSACHUSETTS a I j (BOX MOTION non LOOMS Ap plication fiia February a, 1929. Serial in. 338,545.

'Ihisinvention relates to box motions for looms, an object of the {invention being to provideimproved means for raisingand lowering the loom boxes at the end of the l lay of the loom so that any desired shuttle compartment can be moved into alinement with the lay. More particularly the invention is designed as an improvement upon the apparatus or mechanism disclosed inPatent granted May30, 1 916, to Louis H.Landry.' j

With these and other objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts, which will be more full hereinafterdescribed andpointed out in fie claims." l I In the accompanying drawings- Figure 1 is a browen view in front elevation 'showingthe lay of the loom and the boxes and operating parts in elevation;

Figure 2 is a view. partly in section but mainly in plan of Figure 1'; i

t Figure 3 "s an enlarged view in section on the line 33 of Figure 1;

t Figure 4 is a view in elevation showing features of constructionof the patent to Landry above referred to together with a portionof our improved box motion mechanism; 1 Figure 5 is a fragmentary the operating chain41;

Figure 6 is a plan view in detail of the guide 34:; i i

Figure 7 is a plan view of the raising lever-s1;v I

Figure 8 is a distorted or schematic view, somewhat diagrammatic, showing the arrangement of .chainsa-nd pulleys for controlling the vertical movement of theboxes.

We shall first describe those features of construction of the Landry patent above referred to which we employ in connection with our improvement, these partsbeing illustrated in Figure 4 of the drawings.

, The main shaft (not shown) drives the chain cylinder shaft and alsooperates an upright shaft 23. The shaft 23 is shown as driving a shaft 24by. means of bevel gears,

plan view of i and connected with the latter shaft are eccentric gears25 and 26 which rotate a horizontal shaft 27 carrying a crank arm 28. The object of the eccentric gears is to provide a construction in which the speed of the shaft 27can be made to vary during a complete rotationso as to raise the boxes slowly and drop them rapidly.

To the crank arm 28 a cam lever 30 is connectedwhich operates a swinging lever 3l pivoted to the frame of the loom. This lever is shown as pivotally connected with a sliding block or frog 32, which is provided with a longtudinalslot 33 therein through which projects a guide 34 which is mounted on the frame and has a plate 35 on the outer end to keep the frog in position on the guide. This frog is shown as having two projections 36 on opposite sides.

The chain cylinder 40 which is mounted onthe shaft 20 is provided with the usual operating chaintl as is well understood in this art. This chain is designed to lift in turn a plurality of vibrators or levers 42 pivoted on a rod 43. In the present case four of these levers are provided for,each one having a spring 454 for normally pulling it down on the chain of the cylinder. Each lever has a projection 45 adapted to engage in away on the bottom of a raising lever 46 i so that when the chain raises one of the vibrators, the corresponding raising lever will be raised.

Each of theseraising levers is shown as provided with a slot 47 passing over a shaft 48cm the frame so as to permit the raising lever to move back and forth. Each of the raising levers has a c-amsurface 49 on its upper side along which slides a projection 50 on a let-down lever 51. i The surface 49 gradually rises toward the right so thatas J the let-down lever is pulledback it gradually rises and finally becomes disengaged from the projection 36. i1

The raising levers and the let-down levers are provided withprojections or teeth 52 and 53, respectively, which are engaged by the projections of the frog as the latter reciprocates.

When any one of the vibrators is permitted to rest back on the chain cylinder on eecount of the absence of any roll of the chain at that point, the corresponding raising lever drops down out of the way of the lower projection 30 and at the same time the corresponding let-down lever drops down into position for its tooth to engage the upper projection 36.

Certain of the raising levers 46 extend back of the shaft 48 and are pivoted to short levers 60. The others extending farther back and are pivoted to long levers 61. Both of the short and long levers are mounted to swing freely on a shaft or stud 62 fixed to the frame.

The operation of this part of the device is as follows: WVhen the frog moves to the left, the lower projection 30 thereon will engage one or more of the teeth 52 on account of those levers being raised by the chain. Consequently, the motion of the frog will pull one or more of the levers 46 to the left.

The long and short levers are returned to a normal position or moved backwardly to some other position by means of the letdown levers which, as has been explained,

are operated when thefrog moves to the left.

This operation takes place in a very simple manner through levers 68 pivoted on the shaft 48 and each connected with one of the let-down levers 51.

Each of these levers 68 is connected by a link as 69 with either a short or a long lever. Each lever 68 also has a notch adapted to be engaged by a tooth on a lock finger 71 which is normally pressed upwardly into locking position by a spring 72.

The vibrators 42 are provided with projecting fingers 73 which engage over the ends of the lock fingers and unlock the same when the vibrators are pulled down by their springs 44,. which are stronger than the springs 72. Each lever 68 has a tooth 740 to limit the backward motion of rotation.

When it is desired to keep the boxes at their highest limit on both sides of the loom so that the shuttle will play back and forth in a single box, which of course is done for weaving selvages or certain simple fabrics, the following mechanism is provided: The several vibrators are provided with operating surfaces 74 which are adapted to be engaged by a projection on theshaft 75.

The mechanism above described is dis closed in the patent to Landry above referred to, and our invention resides in the operating mechanism including the arrangement of levers 60 and 61 for connection with the boxes and to take the place of the levers, crank arms and other mechanism shown in the Landry patent as it has been found. that this arrangement of levers is not powerful enough to properly control the movement of the boxes.

We employ two short levers 60 and two long levers 61, each pair of levers c0I 1 Si s1; v

ing of a short and long lever having a chain 1 connected thereto and passed around a grooved pulley 2 mounted in a fork 3 adjustable on a rod 4, as clearly shown in Figures 1 and 2 of the drawings.

The long lovers have pivoted extensions 5 adjustable by means of set screws 6, and these extensions 5 have slots 6 therein, and the short levers 60 have slots 7 therein. The chains 1 have their ends adjustably secured in the slots 6 and 7 through the medium of clamping studs or bolts 8 which permit the adjustment to vary the movement imparted to the pulley 2 and the rod 4.

It is to be understood that one pair of levers, consisting of a short lever 60 and a long lever 61, controls the vertical movement of the boxes A and B at opposite ends of the lay C. The movement of a short lever moves a box one step, the movement of a long lever moves a box two steps, and the combined movement of a short and long lever moves a box three steps.

Where a four-box assemblage is employed, such as illustrated in Figure 1, this threestep control is all that is necessary to bring the boxes in alinement with the lay, and as there are boxes A and B at the opposite ends of the lay the two sets of levers will control the position of the boxes.

No attempt is made to illustrate in detail a loom mechanism but the parts are illustrated more or less diagrammatically in Figure 1 in which the boxes A and B are movable vertically in guides 9 and have box rods 10 and springs 11 guiding and controlling the boxes in the guides.

A bracket 12 on the loom provides rotary mounting for a sleeve 13 in which a shaft 14 is mounted to turn. A pulley 15 is keyed to one end of the sleeve 13 and a segmental pulley 16 is keyed to the other end of the sleeve 13. A pulley 17 is keyed to the shaft 14 and located opposite pulley 15, and a segmental pulley 18 is also keyed to the; I

shaft 14 and located opposite the segmental pulley 16.

. Chains D and E are secured to the ends of the rods 4, 4 and are passed partially around the pulleys 17 and 15 and secured to said pulleys. Another pair of chains F and G is secured to the segmental pulleys 16 and 18, respectively, and impart motion to elevate the shuttle boxes, as will now be explained.

The chain F secured to segment 16 passes downwardly and around a pair of idle pulleys 80 and 81, thence upwardly and over an idle pulley 82,, and thence downwardly and secured to a clip 83 on the rod 10 of the left-hand series of boxes.

The chain G passes downwardly around idle pulleys 84 and 85, thence upwardly around an idle pulley 86, thence extends transversely of the loom and over an idle pulley 87, thence downwardly and secured to a clip 88 on the rod of the right-hand ment of the boxes at one side of the lay, and

the other set of levers controls the movement of the boxes at the other side of the lay.

A fine adjustment is possible, in order to insure an exact alinement of the boxes with the lay,dueto the adjustment of the chains at their points of connection with the levers and the adjustment of the rod 4 relative to the fork 3 as it will be noted that we employ at this point a nut 89 capable of adjusting my vi) the boxes.

A quick manual adjustment is permitted by reason of the employment of the set screw 6 which varies the angle of extension 5 relative to the lever 61 and hence changes the chain coupling means so that an exact adjustment may be quickly had at any time.

Various changes and alterations mlght be made in the general form of the parts described without departing from our invention and hence we do not limit ourselves to the precise details set forth but consider long lever and a short lever with a slot, a flexible connector between the free ends of the levers in the bight of which connector the pulley is located, one end of the connector having mounting in the slot, an extension movably mounted on the other lever having a slot receiving the other end of the connector, said extension having a heel, and means carried by the respective lever to act on the heel and move the extension on its mounting thereby to adjust the heel as to distance in respect to the levers.

JOEL HAROLD ATWOOD.

CARL S. PROCTOR.

ourselves at liberty to make such changes and alterations as fairly fall within the spirit and scope of the appended claims.

We claim: V 1. The combination with a loom having a lay and vertically movable boxes at the ends of thelay, of selectively moved levers arranged in pairs of different lengths, flexible devices connecting the levers of each pair, pulleys engaged by the flexible devices, a shaft, a sleeve on the shaft, pulleys and segments fixed to turn with the sleeve and shaft, respectively, means operatively connecting the first mentioned pulleys with the pulleys on the shaft, flexible devices secured to the segments, and idle pulleys supported by the loom and over which said flexible devices are passed and operatively connected to the box supports at the ends of the lay.

2. In a box motion for looms including a shuttle support, a pair of pivoted levers comprising a long and a short lever, a flexible connector between the free ends of the levers, a pulley located in the bight of said connector, selector means for swinging either lever or the pair; in combination, a flexible coupling joining the pulley to the box support, an extension .movably mounted on one of the levers and having one end of the flexible connector attached thereto, and means carried by said lever for moving the extension on itsmounting thereby to obtain an adjustment of the pulley as to distance from the levers. V

3. In a box motion for looms, a pulley having a coupling with a shuttle box support, a pair of pivoted levers comprising a 

